Common Yellowthroat Warbler (juvenile)

Stirred Mocha and I discussed this and believe it to be an immature common yellowthroat. Really can't explain the black dot on the belly, but characters don't fit to be anything else. Huge shot in the dark here, but to me the black spot looks like someone had ink on the end of their finger and made the black spot that way. Looks too clean to be from some sort of food he may have been eating, and too dark to be from a shadow. He could have been caught mist netting and for whatever reason they decided to mark him that way rather than banding. I could also be very, very wrong about the black spot :)

No idea...doesn't match anything I'm looking at in my references. Curious to see what ID is given.